Question

Which of the following pairs show reverse properties on moving along a period from left to right and from top to down in a group

• A. Nuclear charge and electron affinity
• B. Ionisation energy and electron affinity
• C. Atomic radius and electron affinity
• D. None of these

Answer 1

Answer: (C)

Atomic radius and electron affinity

Answer 2

Atomic radius increase from top to bottom in a group while decrease from left to right in a period on the other hand electron affinity shows severe trends i.e. decrease from top to bottom in a group and increase from left to right in a period.